@mixin btn-custom-modal-spacer() {
  /* stylelint-disable function-disallowed-list */
  padding: calc(var(--#{$prefix}modal-header-padding-y) * 0.5)
    calc(var(--#{$prefix}modal-header-padding-x) * 0.5);
  margin: calc(-0.5 * var(--#{$prefix}modal-header-padding-y))
    calc(-0.5 * var(--#{$prefix}modal-header-padding-x))
    calc(-0.5 * var(--#{$prefix}modal-header-padding-y)) auto;
  /* stylelint-enable function-disallowed-list */
}
